Automatic riveting press



Aug. 25, 1931. R. A. S'KRIBA' ET AL 1,320,254

.wz'omuc RIVETING PRESS I Fild Nov. 7, 1928 3'Sheets-Sheet 1 Aug. 25, 1931. R. A. SKRIBA ET'AL 1,820,254

AUTOMATIC RIVETING PRESS Filed Nov. 7; 192e s Sheets-Sheet 2 R. A. SKRIBA ET AL AUTOMATIC RIVETING PRESS Aug. 25, 1931.

Filed Nov. 7, 1928 3 Sheets-Sheet 5 Wzeaa.

' t tj Ads-5251 3 1 7 i *1- 5' structural; memben tol which, ,theyI are t6:- be

p riveted,.!andin v which it. is desirable to; have means for; arresting the, rivet at the enjdbfits .ithrow in accurately predetermined position tha't will insure its encounter bythe riveting 10 plunger and I in which,- also, it is; desirable,

i to, have: means for promptly ,and automatically displacing the structural member; upon completion oithe rivetingioperation in order to clearxthearivet I channel forathe' gsncceeding .rivetand iniwhieh displacementit' is neces: 'sary' that' the rivetarrestin'g means yield the 3 rivet toadisplacement along Lwith; thefstri etural member; i I The object of the invention is to provide means for-realizing the functiOnS. above set forth. H Accordingly one feature 50f ;the, in-. vention consists, in: providing in-a' channel through --j which=rivets aregfe'd to a, riveting point, .rneans, preferably a springpressed 31 25 aW, Wl1lChgWill 1 arrest the movement; of the V rivet supon arrivalet the; riveting peint and g hpld lit the'r'e accurately in position while" a p'pared hole isengaged OVer a {protruding end of the rivet, but whichholdin 'meanstvvill to the rivet so that the rivet after being united to the structural-member may con tinue its, movement untilit emerges from the -'35 "channel, And another feature of theinven' 'tion consists;inmennting'iipon; the,;press a kick-01f lever or levers fulcrumed i-n posi- ,-t o swi g p t the' on pp r endem- -part displacing movement tq'ithe structural wi h t e 'p p n i t r a hi tim in relation ;.to {the ,movernent ;pfgthe pre ss plunger the preferred. embodiment Qf this e Qffi in nt on.-inv lYingthe, -usep 1e 1 bell crank" lever, or ,a lever [with a lateral fofiset "fqrithe kickoff-queens;,ajpick lip heck traveling ina path which causes itto engage the z fise k -0 l ver' h hha bodi-ly movement 1in,..a directien to -.cause the 5.0 =ik k-0fi lever toi w ig Pest 't1' ew' Qrkf; P-'

yield {to 'alono'rmal displacing; iorce; applied member; sg thatit will carry the rivet alehg,

1 mvmmms H lever; a spring controlling the pick uphcok I .(preferablytthrough meanspan jofi'setlon a'1d;h00k )';"and;a stop fortripp g hQ'Pi'Cki v I it v .f i ment'; of the hO-Ok d'p eferablyin the Path 1 v of t e lofiset of K the hook) saidv stopfbging adjustablein-the pathof itsactibn, and them I i; I s eing preferably. eslimitingip 7 Q N vhifstillranother, feature Qfthe inventi rice-0mm r p up hook, located in the path ofgbodily mov e scr'ew for the kick-elf vlever. v I

jsists in previdinga broad fiat Work engaging tab1e',[ancl in ccnductinguthefrivets from th i i point of -clischarge Jfromz the riv t; chute; to

t the position'at whiehrthey are ;inserted-in the 1 workpiece 1 in such, agma'nner that" they; :do :1

fb the wo pi ce: t ng 77 19. k e p s d r riv a dJammie-machin or of: J

p'o' i r v sin 'eil n wit t pr per i .th as p mp ny ngdra ings, "wh h:

n by-away f, il i n "vention is immediately concerned; 1

,gFigure 2 i's1 ,a frontelevatiof pf th tio infief'the pressinelndingithe worki supshown" in section.- I

' striicturalniember thjrqugh meansof {af.pre+ JF'gure1 'sia,sideelevation of thoseflpeie 16 1 -61. punch press yvith which the. :i"

e same.

1 "pes io ng'e h w rkpi upo h bleth -P e e r d-em me t;.oivfihe il Yntien". v

' fjEiglireiiisaplan view of the levv'er por- ,l p

v ig 41 a deanjviewgaw rr iiif i ure. 011a xe ged is'c l s wa ir shovvninFigure 4;] 1; 1 represents a bed, Qia Work; supp0rt, .3 a

iplunger in, which the riveting" die :is -mountekil. 1-, r

frection by spring J8 and in; the opposite (11 Figure 5 is'a front felevatienipfpthe parts I v frivetf feeding channelleadingto the workr support, 4 a rivet feedingslide; 5V-ariveting die, and ,6; a vvertically"reciprocating, press rection by cam 9, as fully set forth and claimed in our copending application, Serial No. 300,240, filed August 17, 1928. Rivet receiving port 300 may be connected with a rivet chute 36 leading from any suitable source of supply, for instance, that shown piece of material may be disposed upon the work-engaging table and permitted to remain thereon during the insertion of successive rivets without interfering with the feed ing of the rivets from the receiving port 3m across the table to a position beneath the riveting die 5. r

In order to arrest rivets, such as X (F1 gures 3, 4,- and 5) at the Work support and properly spot them in position to receive the riveting die 5, but yieldingly arrestthe rivets so that. they may continue their passage out .of-the rivet channel when the'riveting is completed, said channel is provided with a -jaw pivoted at 11 and pressed normally'in rivet-gripping position by means of spring 12; said'jawbeing incorporated in one lateral confine of the rivetchanneI 3 in such position that it willgrip the rivet against the opposite wall of the channel; and said -jaw'being concaved, as shown at 10a (Figure Hand having its concavity so presented that itwiil prevent the rivet from passing on-out of the channel Shy the momentum'ofthe rivet under the forward stroke of the slide 4, and at the same time will meet thesurface of the rivet at an angle to the line of rivet movement sufiiciently less than the slipping angle to prevent extruding the rivet backwards. Through this means the rivet isheld and spotted beneath the'die 5 with suflicient stability to adapt the upwardly protruding end of the rivet X (Figure 5) to serveas a spotting pin or feeler. for the prepared opening in the structural member that istoberiveted. 1 In order that the structural "'iember Y, together with the secured rivet X may be automatically displaced from the work support immediately the riveting is completed,

and so. make wayfor the next ensuing rivet that is automatically advanced, a kick-off lever 13, preferably in duplicate or dual form as shown in Figure 2, is mounted upon stationary fulcrum 14 which, as shown in Figure 2, constitutes apair of stubshafts mounted in hangers 15 bolted at 16 to fixed portions of the press, from which fulcrums the levers 13 depend in position to sweep past the work support 2 in their lever action. These levers 13 are controlled in one direction by spring or springs 17 and in the opposite direction by means .of pick-up hooks 18 pivotally mountedat 19 upon the plunger 6, and therefore having bodily movement in a path which causes them to encounter offsets 13a extending" laterally from the kick-off levers 13 and in" coincidence with the up and down movements of said plunger; said pick up hooks having lateral ofisets 20 through which pivotal movements are imparted to the hooks upon their pivots 19, namely, by springs 21 in the direction to cause engagement of the kick-oil lever, and by hook-tripping. stops 22 in the direction to cause the hooks to release the kick-ofi levers. brackets 23 on the fixed standards 24 of the machine and in the path of the hook offsets 20, so that when the plungerG is moved upward'a distance vto impart the desired range of swlnging movement to 'klck-oif levers 13, hook offsets 20 Wlll encounter" the stops 22 and release the levers 13 to their return movement under the influence of springs 17. 25' represents arresting-stops for the lovers 13 for limiting rearward movement of the latter. 'Stops 22 and 25 are vertically adjustable so that the range of movement ofthe kick-off levers 13, within necessary limits, may be varied at will to suit different forms or dimensions of structural members 5 that have tobe riveted.

While we have shown and described the kick-off lever as a dualor twin construction, and have-duplicated the actuating and controlling elements coordinated therewith, it is obvious that the structural, functional, and

cooperative conditions identifying this part. of the invention might be reallzed by unitary elements of like construction and operation. I

WVhile we have, for purposes of illustration, shown and described the best embodiment of the invention nowknown to us, it is to be understood that the invention may 'be embodied. in other physical forms within the terms of the subjoined claims.

- 1. In a riveting press, a reciprocating plunger, awork support, a kick-off lever having a fulcrum located to cause the lever to swing against and displace a structural member from said work support and out of the path of said plungeig'and a lever actuating means carried by the plunger imparting movement to the kickofflever.

"2. In a riveting press, a reciprocating plunger, a work support, a kick-01f lever having a fulcrum located to cause the;lever 'to swing against and disp'lace a structural member from sald work support, and lever Stops 22 are mounted in" actuating means imparting movement to the lever in'timedrelation to'the movement of, the plunger; saidlever actuating means com- I prising a hook; said kick-off lever having an 8 olfset portion extending into "the path of said 'hook; and there being a trip stop in the path of and adapted :to displace said hook. I

3. In a riveting press, a work'supp'ojrt, I

10 a plunger reciprocating to and from said support, a kick-off lever fulcrumed in a plane above the plane of the support and adapted I to swingpast the support, an ofiset extend- 7 ing from said lever, apiok up hook receiv- 1 ing an upward impulse intimed'relation to the movement of the plunger and adapted to engage said offset, and a trip stop in the path of said pick up hook. f t

4. In a riveting press, a work support, a plunger reciprocating to and from said work support, akick-off lever having an offset, a

pick up hook having an offset moving in timed relation to a movementof the plunger and adapted toengage said kick-ofi' lever, and a'trip stop in'the path of the offset of said hookadapted todisplace the hook: from v I I engagement with" said kick-off lever.

'5. In a riveting press, a work support, a I kick-off lever movable past said work sup '30 port, a pivoted pick up hook bodily recipr0- eating in a path that causes it to engage I and impart swinging movement to said lever, j said pick up hook having an offset, and, a hook-tripping stop 'in the path of move-' ment of'saidoffse't adjustable in said path V I:

' to vary the time of tripping.

6. In a riveting press, a work support, a V plunger moving tovand from said support, V a kick-01f lever movable past said work 40 support, a pivoted pick up hook mounted upon and bodily reciprocating with said plunger in a path that causes 'it to engage and impart swlnging movement to said lever, a spring moving said pick up hook into engagement with said kick ofl" lever, an oflt' set on said pick up hook, and a hook-tripping stop in the path of movement ofj said. I

hook oflset. r. g Signed at Chicago, Illinois, this 1st day.

, of November, 192

RUDOLPH A. SKRIBAQ FREDERICK J. ,LITTELL;

as g 

